Enum HostFrame 

pub enum HostFrame {
    Event(Event),
    Command(Command),
}

Phase CPD-1 (cross-process dispatch) — envelope enum for frames sent over the launcher → host pipe direction. Today the host’s read loop only expects Event JSON; CPD-2 extends the read loop to recognize this tagged union and dispatch by kind:

• event → existing event-handling code (state sync from launcher reducer broadcasts).
• command → new command-handling code (saga-issued actions).

Newline-delimited JSON, one frame per line. #[serde(tag = "kind", rename_all = "snake_case")] so the wire shape is e.g. {"kind":"event","event":"pool_window_added",...} or {"kind":"command","cmd":"spawn_pool_window","saga_id":42}.

Schema-only in CPD-1: introduced now so the launcher’s host-pipe writer (CPD-2) and the host’s read loop (CPD-2/CPD-3) can be built against a stable wire envelope without further schema churn.

Variants

Event(Event)

Wraps a launcher-emitted Event being pushed down to the host (existing fanout path; CPD-2 refactors the writer to go through this envelope).

Command(Command)

Wraps a saga-issued Command being dispatched from the launcher to the host. Carries saga_id inside the Command payload.

Trait Implementations

impl Clone for HostFrame

fn clone(&self) -> HostFrame

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for HostFrame

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for HostFrame

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for HostFrame

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.